On June 9, 1978, Church of Jesus Christ of Latter-day Saints (LDS) president Spencer W. Kimball announced a revelation lifting the church's 126-year-old ban barring Black people from the priesthood and Mormon temples. It was the most significant change in LDS doctrine since the end of polygamy almost 100 years earlier. Drawing on never-before-seen private papers of LDS apostles and church presidents, including Spencer W. Kimball, Matthew L. Harris probes the plot twists and turns, the near-misses and paths not taken, of this incredible story.